Blender not registering my SHIFT key
I found a software called AutoHotkey which send keystrokes to other programs and WORKS WITH BLENDER. Just restored my KeyTweak changes to default and restarted the PC, then I installed AutoHotkey and created the following script:

#NoEnv
SendMode Input
SetWorkingDir %A_ScriptDir%
Capslock::Shift
Shift::Ctrl
Ctrl::Capslock


Saved and ran the script as administrator. Works perfectly.